JPH03293091A - Waste water electrolyzing device - Google Patents

Abstract

PURPOSE: To make it possible to continuously operate the apparatus at all times without interrupting electrolytic treatment work of waste water by disposing insulator scraping members of which both side marginal edges are pressed to the surfaces of both anode and cathode plates facing adjacently to each other and which are moved by driving means to slide the surfaces of both plates between both plates.

CONSTITUTION: The arm members 30 of a revolving shaft 70 rotated and driven by the driving of a motor 90 are rotated and, therefore, the scraping members 40 mounted at these members are rotated as well. As the members rotate, the edge parts 43 move in sliding contact with the surfaces of the plates 20 and eventually scrap the deposited precipitate deposited on or adhered to the plates 20 as a result of deposition by electrolyses. If the motor 90 is kept run continuously during the electrolytic treatment, the scraping operation may be continued and, therefore, the continuous operation is made possible at all times without interrupting the electrolytic treatment work of the waste water.

COPYRIGHT: (C)1991,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrolytic treatment device for wastewater, and particularly to an electrolytic treatment device that can be operated continuously.

[Conventional technology]

From the standpoint of pollution prevention, it is necessary to purify industrial wastewater containing dissolved water-soluble compounds in the form of many polar molecules and ions to a certain emission standard value using an electrolytic method. Conventional technologies of this type include: 1) U.S. Patent No. 3.926;
No. 754, 2) No. 4.036,726, 3) No. 4
, 123.339 and 4) European Patent Application Publication No. 285,696, the principles, various methods, devices, and effects thereof are disclosed.

These methods generally involve flowing wastewater between negative and positive electrode plates arranged in parallel at regular intervals in an electrolytic cell, electrolyzing the wastewater by passing an electric current through the plates, and turning water-soluble compounds into insoluble precipitates. Depending on the component, it is designed to remove harmful substances or, depending on the ingredients, to convert harmful substances into harmless or less toxic substances through chemical reactions. Among them, 1) discloses a device configuration in which the electrode plates are arranged in parallel along a vertical plane.

[Problem to be solved by the invention]

However, according to the description in 3) above, in a treatment system that meets practical standards, depending on the material of the electrode plate, the generated precipitate is deposited on the electrode plate or deposited in the liquid passage, and if the lumps gradually become larger, the In addition to impeding the flow, the voltage increases due to the accumulation of precipitates on the electrode plates, and oxygen bubbles are generated on the surface.To solve these problems, periodically dilute the tank with inorganic acid. It says that the deposits on the electrode plates must be removed by circulating cleaning with liquid. In this way, periodic pickling of the electrode plates must be carried out after stopping the electrolytic treatment.
In addition, in order to be able to carry out electrolytic treatment and pickling treatment consistently and continuously, the above-mentioned three
), it is necessary to bypass the piping of the pickling treatment system, and in addition to the electrolytic treatment work, it is necessary to periodically discharge the waste water in the electrolytic cell, pickle treatment process, and collect the pickling liquid. It also comes with other troubles.

The present invention has been made in view of these circumstances, and it is an object of the present invention to provide a wastewater electrolytic treatment apparatus that can be continuously operated without interrupting the wastewater electrolytic treatment work.

Another object of the present invention is to provide an electrolytic treatment apparatus for wastewater in which the wastewater does not stagnate (and can sufficiently come into contact with the electrolytic electrode plate).

The present invention also provides an electrolytic treatment device for wastewater that can flexibly increase or decrease its wastewater treatment capacity.

[Means to solve the problem]

Therefore, in the device of the present invention, flat plate-shaped electrolytic electrode plates of negative and positive polarity, which are insulated from each other, are arranged in parallel at regular intervals inside an electrolytic cell body, and waste water is circulated between the two electrode plates, and at the same time , in a wastewater electrolytic treatment apparatus configured to pass current through bipolar plates, the electrode is moved by a driving means between the negative and anode bipolar plates which are adjacent to each other and are brought into contact with the surfaces of these opposing bipolar plates. Accordingly, an insulator scraping member that slides on the surface of the bipolar plate is provided.

The present invention also provides the above device, wherein the scraping member is formed of an elastically deformable resin such as Teflon (trade name of polytetrafluoroethylene) so that both side edges that come into contact and slide form edge portions; The driving means includes a rotating shaft that is mounted so as to pass through approximately the center of each electrode plate and is driven by a motor, and a front δ that protrudes approximately in the direction of the rotation radius from a position between each electrode plate of the rotating shaft. and an arm member that holds the self-scraping member.

In addition to the above-described configuration, the device of the present invention has the respective electrode plates arranged in parallel from bottom to top along a substantially horizontal plane, each outer peripheral edge being watertightly connected to the inner wall of the electrolytic cell. Each electrode plate is provided with a through hole for distributing wastewater, and each electrode plate is arranged such that these flow holes are located on opposite sides of adjacent electrode plates. Configure it so that

In addition, in the above-mentioned device in which each electrode plate is arranged in parallel from bottom to top along a substantially horizontal plane, the electrolytic cell is formed into a hoop-shaped cell that can independently hold one electrode plate watertight for each electrode plate. It is constructed by connecting joint members in a watertight manner.

In addition to the above, the cross-sectional shape of the electrolytic cell in the present invention may be circular, oval, square, or polygonal, but it is preferably circular in view of the movement form of the scraping member, and at least the inner peripheral surface is circular. It is preferable that

The material of the electrolytic electrode plate can be selected from iron, steel, stainless steel, other iron alloys, aluminum, aluminum alloys, etc. depending on the characteristics and chemical composition of the treated wastewater.

The material of the scraping member must be insulating, preferably chemically resistant to strong acids, strong alkalis, and corrosion, and has sufficient mechanical strength and these properties are stable even at high temperatures. For example, PVC, polypropylene,
Polyethylene, polytetrafluoroethylene (Teflon), acrylonitrile butadiene styrene copolymer, nylon 6, nylon 66, and other resins alone, or composite materials made by reinforcing any of these with glass fiber or carbon fiber. can be used. In one embodiment of the present invention, a Teflon scraping member was used, but in order to increase the scraping effect by giving the edge part an appropriate roughness to the electrode plate surface, an appropriate amount of glass beads was added to the Teflon. At the same time, a coupling agent is used to strengthen the adhesion between the two.

[Function] According to the configuration of the electrolytic treatment apparatus for wastewater of the present invention, a scraping member is provided between the electrode plates inside the electrolytic cell in sliding contact with the surfaces of the two electrode plates, and the scraping member is provided on the surfaces of the two electrode plates. By providing a driving means to move the electrode, the scraping member is constantly slid against the electrode plate surface during the electrolytic treatment of wastewater, so that substances generated or attached to the electrode plate surface are constantly scraped off. become.

In the above device, as in the present invention, the electrode plates are arranged horizontally in a stacked manner from bottom to top, and liquid flow holes are alternately bored in the opposite edges of each adjacent electrode plate to form a curved flow. By forming the channel, sufficient drainage water is brought into contact with the plate.

In the apparatus of the present invention, the capacity of the electrolytic cell, that is, the wastewater treatment capacity, can be adjusted by forming the electrolytic cell from hoop-shaped joint members, one for each electrolytic plate.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.The tip is attached to an arm member 30 that protrudes outward from the position of each electrode plate on a rotating shaft 70 with a square cross section that is pivotally supported on a bottom member 60. The scraping member 40 is moved by the rotational drive of the motor 90 and is slid by applying the edge portions of both side edges thereof to the surfaces of the opposing bipolar plates 20.

Hereinafter, details of the main parts of each of the above configurations will be explained with reference to FIG. 12 as well as FIGS. 3(a), (b), and (C).

Each node member IO is molded from A B-3 resin, and the wastewater electrolytic treatment apparatus 100 combines the node members 10, the number of which is determined by the amount of wastewater to be treated, in a stacked manner in the vertical direction, and includes a top cover member 50 and a bottom. Tie rod 1 together with lid member 60
A cell body 1 of an electrolytic cell is assembled with 9, and inside this cell body 1, one plate is held in each joint member IO, and its terminals 21 are alternately connected to a power connection lotus 80 of negative and negative polarity. Each seal ring 1 is inserted into an annular groove 11L112 provided in each electrode plate 20 by skewering each electrode plate 20 from the upper cover member 50 along the axis of the tank body 1.
A lug is formed on the outer periphery with through holes 16 formed at eight equally spaced locations, and a hole 15 is provided at one location to communicate the conical seat 13 with the outside. (Figure 3(a)).

In this example, each electrolytic electrode plate 20 is formed from a steel plate material into a disc shape with an outer diameter that fits approximately into the circular seat 12, and has a notch at one location on the circumference that extends from the opening 15. A connecting terminal portion 21 is provided in a protruding manner, and a threaded hole 211 for connection is bored in the center of this terminal portion 21, approximately 90 degrees from the position of the terminal portion 21.
An arcuate communication hole 23 is provided in the circumferential portion of the rotor, and an axial hole 22 is provided in the center portion of the circle, into which the rotary ring 70 is loosely inserted.

The arm member 30 interposed in the gap between the electrode plates 20 along the radial direction is operatively engaged with the rotating shaft 70 through a square hole 31 at one end, and the other rotating end 32 is provided with a slot in the longitudinal direction. 33
It is formed into a hawk shape.

As shown in FIG. 4, the scraping member 40 has an elongated groove-shaped bar shape with a slightly wider opening, and the bottom part 41 of the groove is sandwiched between the split grooves 33 to open laterally and form an arm. It is held by the rotating end portion 32 of the member 30, and edge portions 43 are provided at the distal edges of both side wall portions 42 in the expansion direction, and the upper and lower bipolar plates 2
It is made to come into elastic contact with the surface of 0.

The upper cover member 50 has a disc shape with a shaft hole 51 in the center, an outlet 52 near the shaft hole, and a through hole 53 corresponding to the eight through holes 16 of the node member 100 in the peripheral portion. It has become.

The bottom cover member 60 has a disc shape that corresponds vertically to the top cover member 50, and has a bearing seat 61 in the center that is recessed so as to protrude toward the opposite side, an inlet port 62 near the bearing seat 61, and an inlet 8 on the periphery. Through holes 63 are provided at equally spaced positions, and a pipe joint 64 and a movable support frame 65 are attached to the bottom surface of the inlet 62 .

The driving means in this embodiment includes the arm member 30, a rotating shaft 70 to which the arm member 30 is attached, and a motor 90 that rotationally drives these members. The rotating shaft 70 has a rectangular shaft rod part 71 inserted into the tank body 1, and its lower end is pivotally attached to the bearing seat 61 via a bearing 72, and the front position member 30 is engaged between the pole plates 20 and 20. the upper end shank part 73
Although the details are omitted, after extending to the outside from the shaft hole 51 of the upper cover member 50, it is connected to the output shaft 91 of the motor 90 supported at the upper part by a joint 74, and is driven and rotated. In addition, in the part of the shaft rod 71 through which the pole plate 20 is inserted, there is an annular bushing 25 which is externally fitted through the square hole thereof, and a shaft hole 22 of the pole plate 20.
A ring metal 24, which is fitted into the ring metal 24, is slidably interposed therebetween (FIG. 3(C)).

In the device 100 according to the above configuration of the present embodiment, a predetermined number of electrolytic electrode plates 20 are fitted into a circular seat 12 having a small inner diameter of a joint member IO via a seal ring 14, and a terminal portion 21 is inserted into a hole 15.
The top cover member 50 is placed in a stacked manner on the bottom cover member 60 in the extended state (FIG. 3(b)), and then the top cover member 50 is placed on the top node. At this time, each electrode plate 20 is Terminal part 2
1 and the terminal portions 21 of adjacent nodes are arranged at 180 degrees to each other, each divided into cathodes and anodes and arranged in two rows, and at the same time, the communication holes 23 at every other node are separated from this by approximately 90 degrees and are opposed to each other. They are arranged by turning and adjusting the joint members 10 so that they are lined up side by side. The rotating shaft 70 has its tip pivotally attached to the bottom cover member 60, and is operatively connected to the motor 90 with the arm member 30 having the scraping member 40 attached thereto as described above engaged between each electrode plate 20. let Thus,
Through holes 1 corresponding to each other in each electrode plate 20 in the above state
6, the through hole 53 of the top cover member 50, and the through hole 63 of the bottom cover member 60 are lined up in a straight line in the vertical direction, so each row is inserted with a tie rod 19 and tightened using screw tightening means or the like to make it watertight. Make electrolytic cell 1. Subsequently, the terminal portions 21 arranged in two vertical rows are connected to the same bus 80 with screws, and one bus 80 is connected to the cathode of the power source, and the other bus 80 is connected to the anode.

In the device 100, if waste water is sent from the pipe through the pipe joint 64 and from the inlet 62, and a voltage is applied to all the electrode plates 20 from the bus 80, the waste water flows inside the electrolytic cell l as shown in FIG. As shown by the arrows in the diagram, the liquid flows through the zigzag passages formed between the electrode plates 20 and the respective communication holes 23, and is electrolytically treated during this period and discharged from the outlet 52.

The precipitates deposited or attached to the electrode plate 20 by electrolysis are rotated by the drive of the motor 90, and the arm member 30 of the rotating shaft 70 rotates, so that as shown in FIG. The scraping member 40 attached to this also rotates, and the edge portion 43 moves in sliding contact with the surface of the electrode plate 20 to scrape off the precipitate, causing the motor 90 to continuously rotate during the electrolytic treatment. If you do so, this scraping operation will continue.

Note that the scraped precipitate is discharged from the outlet 52 together with the waste water and subjected to a precipitate removal treatment, but since this is well known, the explanation will be omitted.

〔Effect of the invention〕

According to the present invention, the precipitate deposited by electrolysis and deposited or attached to the electrode plate 20 is rotationally transmitted by the drive of the motor 90 and the arm member 30 of the rotating shaft 70 rotates.
The scraping member 40 attached to this also rotates, and the edge portion 43 moves in sliding contact with the surface of the electrode plate 20 to scrape off the precipitate, causing the motor 90 to continuously rotate during the electrolytic treatment. Since this scraping operation can be continued, it is possible to provide a wastewater electrolytic treatment apparatus that can be continuously operated without interrupting the wastewater electrolytic treatment work.

The present invention also provides the electrolytic treatment device for wastewater, in which the wastewater is distributed between each electrode plate 20 and through each communication hole 23 in the electrolytic cell 1.
The precipitate is circulated through the zigzag passage formed by the above, and is electrolytically treated during that time, and the precipitate is constantly scraped off by the scraping operation and immediately discharged from the outlet 52.
Precipitates do not stagnate and accumulate in the flow path, so the water flow is not obstructed, and the waste water is forced to follow a predetermined zigzag path and can fully contact the electrolytic electrode plate without stagnation, resulting in almost complete flow. can be processed.

The present invention also provides a tank body 1 of an electrolytic cell in which a plurality of joint members 10 are vertically stacked and assembled together with a top cover member 50 and a bottom cover member 60 by a tie rod 19 in the electrolytic treatment apparatus for wastewater. And inside this tank body 1,
One electrolytic electrode plate 20 corresponds to each joint member 10.
Since the structure is such that the capacity of the wastewater is maintained, the joint members 10 and the electrode plates 20 can be arbitrarily adjusted according to the capacity of the wastewater, thus providing an electrolytic treatment apparatus in which the wastewater treatment capacity can be elastically increased or decreased. be able to.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of one embodiment of the device of the present invention, FIG. 2 is an exploded perspective view of the main parts of the device in FIG. 1, and FIG.
), (b), (C1 is a locally enlarged cross-sectional view for explaining the main parts in FIG. 1, FIG. 4 is a side view showing the scraping member attached to the arm member, and FIG. 1 is a sectional view taken along the line A-A of the device shown in FIG. 1, and FIG. 6 is a schematic diagram for explaining the flow path in the electrolytic cell of the device shown in FIG. 1. In the figure, 1 is the electrolytic cell main body, and IO is A hoop-shaped joint member, 20 an electrolytic electrode plate, 23 a communication hole, 30 an arm member, 40 a scraping member, 43 an edge portion of the scraping member, 70 a rotating shaft, and 90 a motor.

Claims (1)

[Claims] 1. Inside the electrolytic cell body (1), planar electrolyte plates (20) of negative and positive polarity, which are insulated from each other, are arranged in parallel at regular intervals, and the wastewater is drained from the electrolyte plates (20). In an electrolytic treatment device for wastewater, which circulates current between the two electrode plates and at the same time passes current through the two electrode plates, the positive and negative electrode plates (20) are adjacently opposed to each other.
During this period, the insulator scraper is moved by the drive means with its side edge portions (43) in contact with the surfaces of these opposing bipolar plates (20), thereby sliding on the surfaces of the bipolar plates (20). A wastewater electrolytic treatment device characterized by being provided with a handle member (40). 2. The scraping member (40) is formed of elastically deformable resin so that both side edges that come into contact and slide form edge portions (43), and the driving means is configured to drive each electrode plate (20). A rotating shaft (70) that is mounted so as to pass through the center thereof and driven by a motor (90), and the scraping member that protrudes substantially in the direction of the rotation radius from a position between the respective electrode plates of the rotating shaft. (
and an arm member (30) holding the arm member (40).
The wastewater electrolytic treatment apparatus according to claim 1. 3. Each of the electrode plates (20) is arranged in parallel from bottom to top along a substantially horizontal plane, and each outer peripheral edge is watertightly connected to the inner wall of the electrolytic cell body (1), and each of the electrode plates A through hole (23) for distributing wastewater is provided in each plate (20). The wastewater electrolytic treatment device according to claim 2, wherein the wastewater electrolytic treatment device is arranged so as to be located in the same position. 4. The electrolytic cell body (1) has one for each electrode plate (20).
4. The wastewater electrolytic treatment apparatus according to claim 3, wherein the hoop-shaped joint members (10) each capable of holding one electrode plate watertightly are connected to each other in a watertight manner.